Periodontologi Tjenester AS

Periodontologi Tjenester AS is a company based in Norway offering dental services in the field of Periodontology. The company is run by Periodontist Rita Matos Cruz.

Periodontist Rita Matos Cruz

Periodontist Rita Matos Cruz collaborates with general dentists who refer their patients for the diagnosis and/or treatment of several periodontal diseases and conditions as well as for the placement of dental implants to restore teeth lost due to Periodontitis.


  • DMD, MSc
  • Graduated from EFP accredited programme in Periodontology at Complutense University, Madrid (2011)
  • Member of EFP Alumni
  • SAK Autorisasjon som Tannlege (2013)
  • Spesialistgodkjenning i Periodonti — Helsedirektoratet (2013)
  • Exclusive practice in Periodontology in Norway (2013-to date)


  • 1998-2004   Degree in Dental Medicine — Fernando Pessoa University, Porto, Portugal
  • 2004-2006   Master in Dental Implantology and Implant-Supported Prosthesis — Alfonso X University, Madrid, Spain
  • 2007-2010   Master in Periodontology — Complutense University Madrid, Spain



  • Diagnosis of periodontal diseases and conditions
  • Comprehensive periodontal treatment planing
  • Scaling and root planning in severe cases or cases associated with any medical conditions
  • Management of perio-systemic complications
  • Resective periodontal surgery
  • Regenerative periodontal surgery
  • Periodontal plastic surgery
  • Occlusal therapy
  • Pre-prosthetic and pre-orthodontic surgery
  • Dental implant placement
  • Ridge augmentation procedures
  • Management of peri-implant lesions


  • Norwegian Dental Association (NTF)
  • Norwegian Society of Periodontology (NPF)
  • Spanish Society of Periodontology (SEPA)
  • EFP Alumni (EFP)

Referrals/ Henvisning

Referral letters or “Henvisning” can be addressed to:

Spes. Periodonti Rita Matos Cruz

Tønsberg Spesialistsenter

Rambergveien 3

3115 Tønsberg

For any other questions regarding the company please send an email to


Periodontist Rita Matos Cruz is currently on maternity leave and is expected to return in October 2018. 

General guidelines for referring patients to a Periodontist

Patients who should be referred to a periodontist

Any patient with

  • Severe chronic periodontitis
  • Furcation involvement
  • Vertical/angular bony defect(s)
  • Aggressive periodontitis (formerly known as juvenile, early-onset, or rapidly progressive periodontitis)
  • Periodontal abscess and other acute periodontal conditions
  • Significant root surface exposure and/or progressive gingival recession
  • Peri-implant disease
  • Periodontal diseases, regardless of severity, whom the referring dentist prefers not to treat

Patients who would likely benefit from being referred

Any patient with periodontitis who demonstrates at reevaluation or any dental examination one or more of the following risk factors/indicators known to contribute to the progression of periodontal diseases

Periodontal risk factors/indicators

  • Early onset of periodontal diseases (prior to the age of 35 years)
  • Unresolved inflammation at any site (for example, bleeding upon probing, pus, and/or redness)
  • Pocket depths greater than 5 mm
  • Vertical bone defects
  • Radiographic evidence of progressive bone loss
  • Progressive tooth mobility
  • Progressive attachment loss
  • Anatomic gingival deformities
  • Exposed root surfaces
  • A deteriorating risk profile

Medical or behavioral risk factors/indicators

  • Smoking/tobacco use
  • Diabetes
  • Osteoporosis/osteopenia
  • Drug-induced gingival conditions (for example, phenytoins, calcium channel blockers, immunosuppressants, and long-term systemic steroids)
  • Compromised immune system, either acquired or drug induced
  • A deteriorating risk profile

Patients who may benefit from being referred

Any patient with periodontal inflammation/infection and the following systemic conditions

  • Diabetes
  • Pregnancy
  • Cardiovascular disease
  • Chronic respiratory disease

Any patient who is a candidate for the following therapies who might be exposed to risk from periodontal infection, including but not limited to the following treatments

  • Cancer therapy
  • Cardiovascular surgery
  • Joint-replacement surgery
  • Organ transplantation

About Refunding/ Helfo Refusjon in Norway

Patients who are referred to the specialist in Periodontology and are residents in Norway are entitled to a partial refund from the Norwegian Health Economics Administration/ “Helseøkonomiforvaltningen” (HELFO).

The refund is valid for the diagnosis (“Omfattende undersøkelse”) and treatment of periodontal and peri-implant diseases as well as for the replacement with dental implants of teeth lost due to Periodontitis.

Find out more here.